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lavc/vvc: Reallocate pixel buffers if pixel shift changes

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Allocations in the following lines depend on the pixel shift, and so
these buffers must be reallocated if the pixel shift changes.  Patch
fixes segmentation faults in fuzzed bitstreams.

Signed-off-by: Frank Plowman <post@frankplowman.com>
This commit is contained in:
Frank Plowman 2024-06-03 14:06:35 +01:00 committed by Nuo Mi
parent 9576a00527
commit d866f49791
1 changed files with 2 additions and 1 deletions
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3
libavcodec/vvc/dec.c
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@ -214,7 +214,8 @@ static void pixel_buffer_nz_tl_init(TabList *l, VVCFrameContext *fc)
const int c_end = chroma_idc ? VVC_MAX_SAMPLE_ARRAYS : 1;
const int changed = fc->tab.sz.chroma_format_idc != chroma_idc ||
fc->tab.sz.width != width || fc->tab.sz.height != height ||
fc->tab.sz.ctu_width != ctu_width || fc->tab.sz.ctu_height != ctu_height;
fc->tab.sz.ctu_width != ctu_width || fc->tab.sz.ctu_height != ctu_height ||
fc->tab.sz.pixel_shift != ps;
tl_init(l, 0, changed);